Alloys used as bearings in aircraft landing gear are required to reduce friction and wear as well as improve the load-carrying capability due to the increased aircraft weights. Cu-15Ni-8Sn-0.8Nb alloy is well known for possessing good mechanical and wear properties that satisfy such requirements. In this study, the microstructure, mechanical properties, and grease-lubricated sliding wear behavior of Cu-15Ni-8Sn-0.8Nb alloy with 0.8 wt% Nb are investigated. The nanoscale NbNi₃ and NbNi₂Sn compounds can strengthen the alloy through the Orowan strengthening mechanism. A Stribeck-like curve is plotted to illustrate the relationship among friction coefficient, normal load, and sliding velocity and to analyze the grease-lubricated mechanism. The wear rate increases with normal load and decreases with sliding velocity, except at 2.58 m/s. A wear mechanism map has been developed to exhibit the dominant wear mechanisms under various friction conditions. When the normal load is 700 N and the sliding velocity is 2.58 m/s, a chemical reaction between the lubricating grease and friction pairs occurs, resulting in the failure of lubricating grease and an increase in wear.

由于飞机重量的增加，需要使用合金作为飞机起落架的轴承，以减少摩擦和磨损，并提高承载能力。众所周知，Cu-15Ni-8Sn-0.8Nb合金具有良好的机械性能和耐磨性能，可以满足此类要求。在这项研究中，研究了具有0.8 wt％Nb的Cu-15Ni-8Sn-0.8Nb合金的组织，力学性能和脂润滑的滑动磨损行为。纳米级NbNi ₃和NbNi ₂锡化合物可以通过Orowan强化机制来强化合金。绘制一条类似Stribeck的曲线来说明摩擦系数，法向载荷和滑动速度之间的关系，并分析油脂润滑的机理。除2.58 m / s的速度外，磨损率随正常载荷而增加，随滑动速度而降低。已经开发了磨损机理图以显示在各种摩擦条件下的主要磨损机理。当法向载荷为700 N且滑动速度为2.58 m / s时，润滑脂与摩擦副之间发生化学反应，导致润滑脂失效并增加磨损。